Have a similar problem.
Boot hangs with only a cursor at top left when I rebooted the system this morning.
However I am able to boot in rescue mode.
The problem seems to be GPU related.
I got an error message that the GPU didn't support wayland. I changed to X11 in /etc/gdm3/custom.conf, but this didn't help. I have still to boot in rescue mode.
Now I get the error message "[drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting."
I also get an error message from the avahi-daemon "chroot.c: open() failed: No such file or directory"
My system
Code:
p-i@pi-Asus-Rog-Strix-B450-F:~$ inxi -Fz
System: Host: pi-Asus-Rog-Strix-B450-F Kernel: 5.4.0-12-generic x86_64 bits: 64 Desktop: Gnome 3.34.3
Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Desktop Mobo: ASUSTeK model: ROG STRIX B450-F GAMING v: Rev 1.xx serial: <filter> UEFI: American Megatrends
v: 2704 date: 08/23/2019
CPU: Topology: 8-Core model: AMD Ryzen 7 1700 bits: 64 type: MT MCP L2 cache: 4096 KiB
Speed: 1375 MHz min/max: 1550/3750 MHz Core speeds (MHz): 1: 1375 2: 1375 3: 1375 4: 1375 5: 1375 6: 1375 7: 1377
8: 1375 9: 1375 10: 1375 11: 1374 12: 1375 13: 1648 14: 1375 15: 1375 16: 1375
Graphics: Device-1: Advanced Micro Devices [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] driver: N/A
Display: x11 server: X.Org 1.20.7 driver: ati,fbdev unloaded: modesetting,radeon,vesa resolution: 2560x1440~93Hz
OpenGL: renderer: llvmpipe (LLVM 9.0.1 128 bits) v: 3.3 Mesa 20.1.0-devel (git-a4e6270 2020-02-03 focal-oibaf-ppa)
Audio: Device-1: Advanced Micro Devices [AMD/ATI] Navi 10 HDMI Audio driver: snd_hda_intel
Device-2: Advanced Micro Devices [AMD] Family 17h HD Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.4.0-12-generic
Network: Device-1: Intel I211 Gigabit Network driver: igb
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: Local Storage: total: 680.02 GiB used: 87.25 GiB (12.8%)
ID-1: /dev/nvme0n1 vendor: Kingston model: SA1000M8480G size: 447.13 GiB
ID-2: /dev/nvme1n1 vendor: Samsung model: SSD 960 EVO 250GB size: 232.89 GiB
ID-3: /dev/sda vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB
Partition: ID-1: / size: 227.74 GiB used: 87.24 GiB (38.3%) fs: ext4 dev: /dev/nvme1n1p2
Sensors: System Temperatures: cpu: 40.0 C mobo: 35.0 C
Fan Speeds (RPM): cpu: 502 case-1: 884 case-2: 825 case-3: 466
Info: Processes: 391 Uptime: 23m Memory: 15.56 GiB used: 2.10 GiB (13.5%) Shell: bash inxi: 3.0.37
p-i@pi-Asus-Rog-Strix-B450-F:~$